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net/mlx5e: Add a lock on tir list
[ Upstream commit80a2a9026b
] Refresh tirs is looping over a global list of tirs while netdevs are adding and removing tirs from that list. That is why a lock is required. Fixes:724b2aa151
("net/mlx5e: TIRs management refactoring") Signed-off-by: Yuval Avnery <yuvalav@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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2 changed files with 9 additions and 0 deletions
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@ -45,7 +45,9 @@ int mlx5e_create_tir(struct mlx5_core_dev *mdev,
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if (err)
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return err;
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mutex_lock(&mdev->mlx5e_res.td.list_lock);
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list_add(&tir->list, &mdev->mlx5e_res.td.tirs_list);
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mutex_unlock(&mdev->mlx5e_res.td.list_lock);
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return 0;
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}
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@ -53,8 +55,10 @@ int mlx5e_create_tir(struct mlx5_core_dev *mdev,
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void mlx5e_destroy_tir(struct mlx5_core_dev *mdev,
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struct mlx5e_tir *tir)
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{
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mutex_lock(&mdev->mlx5e_res.td.list_lock);
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mlx5_core_destroy_tir(mdev, tir->tirn);
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list_del(&tir->list);
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mutex_unlock(&mdev->mlx5e_res.td.list_lock);
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}
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static int mlx5e_create_mkey(struct mlx5_core_dev *mdev, u32 pdn,
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@ -114,6 +118,7 @@ int mlx5e_create_mdev_resources(struct mlx5_core_dev *mdev)
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}
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INIT_LIST_HEAD(&mdev->mlx5e_res.td.tirs_list);
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mutex_init(&mdev->mlx5e_res.td.list_lock);
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return 0;
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@ -158,6 +163,7 @@ int mlx5e_refresh_tirs(struct mlx5e_priv *priv, bool enable_uc_lb)
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MLX5_SET(modify_tir_in, in, bitmask.self_lb_en, 1);
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mutex_lock(&mdev->mlx5e_res.td.list_lock);
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list_for_each_entry(tir, &mdev->mlx5e_res.td.tirs_list, list) {
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tirn = tir->tirn;
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err = mlx5_core_modify_tir(mdev, tirn, in, inlen);
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@ -169,6 +175,7 @@ int mlx5e_refresh_tirs(struct mlx5e_priv *priv, bool enable_uc_lb)
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kvfree(in);
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if (err)
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netdev_err(priv->netdev, "refresh tir(0x%x) failed, %d\n", tirn, err);
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mutex_unlock(&mdev->mlx5e_res.td.list_lock);
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return err;
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}
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@ -743,6 +743,8 @@ struct mlx5_pagefault {
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};
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struct mlx5_td {
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/* protects tirs list changes while tirs refresh */
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struct mutex list_lock;
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struct list_head tirs_list;
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u32 tdn;
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};
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